Plastic bags having drawstrings

Abstract

A drawstring is mounted near the open mouth of a plastic bag by a pressure sensitive tape that freely laterally encloses the drawstring except for projecting free ends, the tape being formed or treated so as to be non-sticky with respect to the drawstring. A high speed production method of making the bags comprises the steps of laying a continuous length of drawstring material across a series of spaced bags, applying strips of pressure sensitive tape to each bag to freely laterally enclose the drawstring length there and severing the drawstring length between bags.

What is claimed and desired to be secured by Letters Patent is: 
     
       1. A bag assembly comprising a limp flat bag of flexible synthetic plastic material having an open mouth and means mounting a drawstring at said mouth comprising a separate tape extending across the width of the bag in flat condition adjacent said mouth, said tape being fixed to one side of said bag except for an intermediate longitudinal area extending from end to end thereof and having a length substantially equal to the width of the bag in flat condition, and a flexible drawstring extending loosely and freely through the entire space between the tape and bag surface at said area and projecting at opposite ends from said tape and beyond the side edges of the flat bag. 
     
     
       2. The bag assembly defined in claim 1 wherein said tape is of the pressure sensitive type and is non-adherent with respect to the drawstring entirely along said area. 
     
     
       3. The plastic bag assembly defined in claim 2, wherein said tape has a fixed isolating strip extending along said area shielding the drawstring from the pressure sensitive sticky surface. 
     
     
       4. The bag assembly defined in claim 2 wherein the pressure sensitive sticky material is absent or removed along said area. 
     
     
       5. The bag assembly defined in claim 2 wherein said drawstring is coated with a release agent rendering it non-adherent to said tape.